FINE STRUCTURE OF NERVE ENDINGS IN NUCLEUS OF TRAPEZOID BODY AND VENTRAL COCHLEAR NUCLEUS
FINE STRUCTURE OF NERVE ENDINGS IN NUCLEUS OF TRAPEZOID BODY AND VENTRAL COCHLEAR NUCLEUS
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DOI：
10.1002/aja.1001180205
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发表时间：
1966-01-01
影响因子：
--
通讯作者：
REESE, TS
中科院分区：
文献类型：
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作者：
LENN, NJ;REESE, TS
大的杯状轴突末梢，以及典型的终端终扣，已被先前描述的耳蜗腹侧核和斜方体的核由光学显微镜。在本研究中，这些末梢检查与电子显微镜在龙猫，大鼠和猫后灌注固定与四氧化锇。发现盏由细长的突起组成，突起起源于有髓鞘的轴突，并与周核和树突形成多个突触接触。这一发现表明，肾盏的一个重要特性是它们可以在单个突触后结构上产生大量的突触活动。与萼状末梢相连的是数量不等的终扣，这些终扣与相同的胞体和树突形成突触接触。大多数的终扣包含较小的突触囊泡比那些存在于萼，这意味着这两种类型的结束之间的解剖和功能的差异。这表明，许多这些在腹侧耳蜗核的终扣的离心，抑制性纤维的终末描述以前的工人。
Large calyciform axonal endings, as well as typical terminal boutons, have been previously described in the ventral cochlear nucleus and the nucleus of the trapezoid body by light microscopists. In the present study, these endings were examined with the electron microscope in chinchillas, rats, and a cat after perfusion-fixation with osmium tetroxide. The calyces were found to consist of elongated processes arising from myelinated axons and making multiple synaptic contacts with perikarya and dendrites. This finding suggests that an important property of calyces is the large amount of synaptic activity that they can bring to bear on a single postsynaptic structure. Adiacent to the calyciform endings were variable numbers of boutons that made synaptic contacts with the same perikarya and dendrites. The majority of boutons contained smaller synaptic vesicles than those present in the calyces, implying both anatomical and functional differences between these 2 types of ending. It is suggested that many of these boutons in the ventral cochlear nucleus are endings of centrifugal, inhibitory fibers described by previous workers.